Foundry-flask



H c. DRUMM.

FOUNDRY FLASK. APPLICATION FILED APR. 17, 1919.

1,335,564; I Patented Mar. 30, 1920,

2 SHEETSSHEET 1- 11v VEN TOR.

' ATTORNEYS.

H. 0. DRUMM FOUNDRY FLASK.

APPLICATION FILED APR.|7,1919- 1.,S35,56%, Patented Mar. 30,1920.

I 2 SHEETS-SHEET 2. l6v

INVENTOR. flemar flflrmm 9 1226 WWW 41TTORNE YS;

HERBERT c. DRUMM, or CANTON, oirro, nssieno-a r0 'rnnnivroniun'rnn MANU-FAOTURING COMPANY, or enrrron, OHIO, A coerce-Arron OF OHIO.

' FOUNDRY-FLASK.

menace.

Application filed April 17, 1919. I

To all whom it may concern:

Be it *known that I, HERBERT C; DRUMM, a citizen of the United States,residing at Canton, in the county of Stark and State of Ohio, haveinvented a new and'useful lloundry-Flask, of which the following is aspecification.

The invention relates to improvements in foundry-flasks, constructed ofsheet metal and more especially to flasks formed of sheets having.spaced outwardly pressed ribs on account of the strength of the metal inproportion to its weight, it being unnecesi to provide stiffening stripsuponthe a1 flaslts as the corrugations therein prevent the usuallateral- "strains and torsional strains, which tend to twist or distortthe flask.-

The object of the invention is to produce a flask formed of one or moresheets connected at their extremities and provided with outwardlypressed ribs forming said retaining grooves and to simplifyand improvethe construction ofmetal foundry flasks.

A further object is to provide a foundry flask formed of sheet metal andprovided with sand retaining strips of greater thickness than the bodyof the "flask.

A still further object is to provide a foundry flask formed ofsheet-metal provided with outwardly pressed ribs located at spacedintervals and forming sandretaining grooves on the interior of theflask, the remainder of the inner walls of the flask being flat andadapted to the attachment of cope bars.

With these objects in view the invention consists in the novelconstruction and arrangement of parts, hereinafter described,illustrated in the accompanying drawings, and particularly pointed outin the appended claims, it being understood that various changes in theform, proportions, size and minor details of construction may be madewithin the scope of the *appended claims, without departing from thespirit or sacrificing any of the advantages'of the invention.

The invention thus set forth in general terms is illustrated in theaccompanying drawings forming part hereof, in which- Figure 1 is aperspective view of the cope section of a foundry flask embodying the invention.

Specification of Letters Pat'ent.

Patented 'Mlar; so, 1920.

SerialNo. 290,745.

Fig. 2 is a vertical transverse sectional view through ohe of the flasksections.

Fig. 3 is a longitudinal section through a portion of one of the flasksections, taken at one corner of the flask.

Fig. -l shows the cope section of a round flask embodying the invention.

Fig. 5 is a vertical, transverse section through a modified form offlask.

Figs. 6 and 7 are fragmentary sectional views of modified forms ofsheets which may be used for forming the flasks.

A practical embodiment of the invention is disclosed in the accompanyingdrawings, forming apart of this specification in which similar numeralsof reference indicate corresponding parts throughout the several views.I

T he usual form of foundry flask coinprises two similar sections knownas the cope section and the drag section provided with means forattaching the two sections together. Both ofthese sections were formerlymade'of wood, but owing tothemolten metal. and the burning gases withwhich the flasks must necessarily be constantly brought into contact, itwas'found desirable that the flasks be constructed of metal, but themetal flasks heretofore in use have been provided with reinforcing orstrengthening strips and with heavy frames and other strengthening meanswhich not only in crease the weight of the flask, which is objectionable, but also add considerably to the cost of manufacture oftheflasks.

The flasks to which this application pertain are formed of one orsometimes two sheets formed into the desired shape, the abutting ends ofthe sheets being connected together by means of attaching strips or bythe usual guide pin brackets.or both. The sheets from which the flasksare formed are provided with spaced, outwardly pressed ribs which formsand retaining grooves upon the interior of the flask, the inner wallsof the flask being flat except for these grooves, thus allowing of theattaching of cope bars. By forming the flasks of such sheets, each flasksection is strengthened sufficiently to overcome the strains to which itis subjected while the corrugations form sand retaining grooves whichtend to better hold the sand in the flask.

Referring first to the construction illustrated in Figs. 1 to 3inclusive, the numerals l1 indicate similar members formed of metalsheets so shaped that when the two members are placed together they willform a rectangular flask section. The section illustrated in Fig. 1 isthe upper or cope section and the lower or drag section is formedidentically the same, the drag section being inverted, however, beforethe cope section is placed thereon. The corrugations 2 are spaced atintervals and extend longitudinally around the flask sections. The upperand lower extremities of the sheets from which the sections are formedare bent inwardly forming the sand retaining flanges 3.

In connecting the members together to form one complete section theabutting ends of adjacent members are placed together, as shown at l,and a flat connecting strip 5 is placed upon the inside of the section,rivets 6 being passed through said strip and the members 11 and throughthe guide pin bracket 7 which is located upon the outside of the flasksection at the longitudinal center thereof. Each of these guide pinbrackets is provided with horizontally disposed ears 8, having theapertures 9 there. in, the ears of the upper and lower sections beingplaced together in the usual manner, allowing the apertures 9 therein toregister in order that the guide pins may be located therethrough.Trunnion handles 10 are shown located upon the guide pin brackets. Itshould be understood, however, that any other usual form of handle maybe provided upon the flask sections.

In Fig. 4 is shown a circular flask section in which one sheet 11 ofribbed metal is bent into circular form, the edges thereof abutting at12, a connecting strip 13 being located upon the inner side of the flasksection, rivets 14 being passed through said strip and through thecorrugated sheet of which the flask section is formed. T he usual guidepin brackets 15 are connected to the outer surface of each flask sectionand handles 16 of any suitable and well known construction are providedthereon.

In Fig. 5 is shown a modified form of the construction especiallyadaptable to extremely large flasks upon which there is an excessivestrain. In this form of flask the corrugated sheet 17 of which the flasksection is formed is not provided with the integral sand retainingstrips, but instead angle irons 18 or other structural forms of slightlyheavier metal than the sheet 17 are riveted or spot welded or otherwiseattached to the upper and lower edges of the corru gated sheet as shown.By forming the sand retaining strips of structural forms heavier thanthe sheet metal from which the flasks are formed several advantages arehad, these angle'irons or other structural forms produce a reinforcementat the parting line thus giving a better parting line in the mold.Further, a heavier wearing surface is produced which is in itself agreat advantage as owing to the excessive wear upon the sand strips,these parts soon become worn extremely thin.

In Figs. 6 and 7 are illustrated modified forms of rolled sheets whichmay be used to form the flasks. In Fig. 6 the sheet is provided atspaced intervals with outwardly pressed V-shaped ribs 18 and in Fig. 7with outwardly pressed tapered angular ribs 19. Either of these formswill give the same advantageous results as the other form of sheet metalabove described as with either the interior of the flask is flat for theattachment of cope bars while spaced sand retaining grooves are providedupon the interior of the flask and the ribs reinforce the flask body. I

I claim 1. A foundry flask formed of sheet metal. spaced outwardlypressed ribs formed in said sheet metal forming sand retaining groovesupon the interior of the flask, the remainder of the interior of theflask comprising intervening flat portions of greater width than thegrooves.

2. A foundry flask section formed of sheet metal and structural forms,of heavier material than the sheet metal, connected to the upper andlower edges thereof.

3. A foundry flask constructed of a sheet of metal provided with spacedoutwardly pressed ribs and intervening flat portions of greater widththan the ribs, sand retaining strips formed at the upper and lower edgesof said section, the ends of the sheet being abutted together and anattaching strip located upon the inside of the flask adjacent theabutting edges and connected thereto.

1. A foundry flask section constructed of sheet metal provided with anoutwardly pressed rib and flat portions of greater width than the rib.

5. A foundry flask section constructed of sheet metal provided with anoutwardly pressed rib forming a sand retaining groove upon the interiorof the flask, flat portions of greater width than the rib andhorizontally disposed flanges upon the upper and lower edges of thesection.

6. A foundry flask section constructed of sheet metal provided withspaced outwardly pressed ribs and intervening flat portions of greaterwidth than the ribs and an inwardly pressed sand retaining flange uponthe lower end of said flask.

In testimony that I claim the above. I have hereunto subscribed my name.

HERBERT C. DRUMM.

